vergobbi

Claim 1

A LINER BAG COMPRISING A THERMOPLASTIC SHEET OF MATERIAL FOLDED TO PROVIDE A RECTANGLAR TUBE OPEN AT ONE END AND PROVIDED WITH A BOTTOM CLOSURE, SID BAG HAVING A SIDE STEAM FORMED BY OVERLAPPING MARGINAL PORTIONS OF THE SHEET MATERIAL HEAT SEALED ALONG TWO RELATIVELY NARROW SPACED LINES TO FUSE TOGETHER THE OVERLAPPING PORTIONS ALONG SAID LINE, SAID SEAL LINES EXTENDING TO THE BOTTOM OF THE BAG WITH THE BOTTOM END OF THE OVERLAPPING PORTIONS UNSEALED IN THE PARTIALLY COMPLETED BAG, SAID BOTTOM CLOSURE COMPRISING OPPOSED INWARDLY FOLDED END WALL PORTIONS OF THE TUBE DEFINING TAPERED FLAPS CONNECTED BY INTERVENING GUSSET FOLDS AND INCLUDING A FIRST FOLDED PAIR OF OPPOSED FLAPS HAVING THEIR END PORTIONS IN SPACED RELATION, AND A LAST FOLDED PAIR OF OPPOSED FLAPS HAVING THEIR FREE ENDS IN OVERLAPPING RELATION, SAID BOTTOM CLOSURE HAVING A PAIR OF RELATIVELY, NARROW SPACED HEAT SEAL LINES COEXTENSIVE WITH SAID SIDE SEAM SEAL LINES AND EXTENDING ACROSS THE OVERLAPPING PORTIONS OF SAID LAST FOLDED FLAPS TO SEAL THE OPEN ENDS THEREOF AND TO FUSE THE FLAPS TOGETHER AND TO THE UNDERLYING FLAPS AND THE UNSEALED EXTENDED PORTION OF THE SIDE SEAM OCCURRING IN THE BOTTOM CLOSURE, SID BOTTOM CLOSURE FURTHER INCLUDING TWO PAIRS OF RELATIVELY NARROW SPACED HEAT SEAL LINES INTERSECTING SAID LAST NAMED BOTTOM CLOSURE HEAT SEAL LINES AND ARRANGED TO SEAL THE OPEN ENDS OF SAID FIRST FOLDED FLAPS AND TO FUSE THE SAME TO THE OVERLYING FLAPS, THE BOTTOM CLOSURE HEAT SEAL LINES ALONG THE OVERLAPPING PORTIONS OF THE LAST FOLDED FLAPS AND WHICH ARE COEXTENSIVE WITH THE SIDE SEAM SEAL LINES AT ONE END BEING ARRANGED TO TERMINATE SHORT OF THE ADJACENT SIDE WALL OF THE BAG AT THE OTHER END, AND THE INTERSECTING HEAT SEAL LINES ARRANGED TO TERMINTE SHORT OF THE ADJACENT SIDE WALLS AT BOTH ENDS OF THE SEAL LINES.